Rigid polyvinyl chloride polymer compositions having improved impact properties
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a polymer composition and impact technology, applied in the direction of organic dyes, etc., can solve the problems of adverse effects on the tensile strength of the pvc, high cost of traditional impact modifiers compared with the cost of rigid pvc, etc., and achieve the effect of improving the impact properties of the composition
Inactive Publication Date: 2007-11-08
EASTMAN CHEM CO
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[0018] The present invention relates to rigid polyvinyl chloride compositions exhibiting improved impact properties, comprising: a polyvinyl chloride resin; and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (TXIB) in amounts up to about 10 phr, wherein the TXIB is dispersed in the polyvinyl chloride resin.
[0019] The invention relates also to processes for the manufacture of rigid polyvinyl chloride compositions in which 2,2,4-trimethyl-1,3-pentanediol diisobutyrate is incorporated in amounts up to about 10 phr to improve the impact properties of the compositions.
Problems solved by technology
While these materials are suitable for such uses, traditional impact modifiers are expensive when compared with the cost of the rigid PVC.
Conventional plasticizers have not typically been used in applications that require rigidity because when used in conventional plasticizer amounts, the tensile strength of the PVC is adversely affected.
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[0041] Eastman TXIB was added to the rigid PVC formulations at levels of 0.2, 0.6, 0.8, 1.0, 2.0, 5.0 and 8.0 phr (parts per hundred resin). The control samples used for this evaluation include a sample containing no impact modifier (C1) and a sample containing 5 phr of Rohm & Haas, Paraloid KM-334 acrylic impact modifier (C2). The formulations were prepared by adding all of the ingredients listed in Table I, excluding the acrylic impact modifier or TXIB, to a Thyssen Henschel, Model FM 10 US mixer, at room temperature. The formulation also can be scaled up to 200 grams depending on the desired amount of final product.
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Abstract
Rigid polyvinyl chloride compositions are disclosed that are suitable for use in applications such as window profiles, door frames, siding, fences, gutters, pipes, electrical junction boxes, automobile interiors and exteriors, appliances, office equipment or medical devices. The disclosed compositions include polyvinyl chloride polymers or copolymers having incorporated therein 2,2,4-trimethyl-1,3-pentanediol diisobutyrate in amounts so as to improve the impact properties of the compositions. Processes for making such compositions are also disclosed.
Description
FIELD OF THE INVENTION [0001] The invention relates to rigid polyvinyl chloride polymer compositions having improved impact properties, making them suitable for use in a variety of end-use applications. The compositions contain 2,2,4-trimethyl-1,3-pentanediol diisobutyrate used as an impact modifier in amounts sufficient to improve the impact properties of the compositions. BACKGROUND OF THE INVENTION [0002] Polyvinyl chloride polymer and copolymer compositions, hereinafter “PVC,” are useful for a variety of applications, including medical, electrical, automotive, and building and construction. For example, PVC is used in the following products: appliances, furniture, window frames, drainage pipes, medical devices, power, data, and telecom wiring and cables, cable and wire insulation, resilient flooring, roofing membranes, automotive interiors and seat coverings, automotive exterior trim and parts, fashion and footwear, bottles and packaging, credit cards, and synthetic leather and ...
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Patent Type & Authority Applications(United States)
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